01-19-2009, 10:21 AM
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CC Member
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Join Date: Jun 2008
Location: West Suburbs of Chicago,
IL
Cobra Make, Engine: Backdraft#357, 392CI Ford Racing, 459hp, 455ft/lbs , TKO 500, 3.43 Gears, Ceramic Coated Headers, Victor Jr. 750cfm, 17in Halibrand wheels, Sterling Gray/Silver Stripes, Gray Leather, Nitto NT05
Posts: 362
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Not Ranked
120 HP for $100 in 20 minutes
120 HP for $100 in 20 minutes
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As a follow up, I just bought my Backdraft at the end of August 2008 and never had it tuned. I thought it was pretty fast, but I took it to Frank at Komet Motorsports for a dyno run. Turned out the primary and secondaries on the carburator were not opening all the way and the float on the carburator was too low.
First run was a paltry 230hp (for this engine) at the rear wheels. In 20 minutes, they found an additional 120 hp. We were at 350hp at the rear wheels and we hadn't touched the timing, finished the adjusting the carbs or fine tuning the engine, but I had to leave.
He found 120hp for $100 in 20 minutes- not bad at all. You lose about 15-20% of HP after the flywheel, so the engine is putting about 430hp now. Frank thinks we can find at least another 25 to 50 hp in there. I will bring it back in spring to finish the job. You should stop by before you head out to Byron next year, it should be worth a few tenths.
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